IEventTargetAddEventListener Method (String, IEventListener, Boolean) |
This method allows the registration of event listeners on the event target.
Namespace: Aspose.Html.Dom.EventsAssembly: Aspose.HTML (in Aspose.HTML.dll) Version: 21.1
Syntaxvoid AddEventListener(
string type,
IEventListener listener,
bool useCapture
)
Sub AddEventListener (
type As String,
listener As IEventListener,
useCapture As Boolean
)
void AddEventListener(
String^ type,
IEventListener^ listener,
bool useCapture
)
abstract AddEventListener :
type : string *
listener : IEventListener *
useCapture : bool -> unit
Parameters
- type
- Type: SystemString
The event type for which the user is registering - listener
- Type: Aspose.Html.Dom.EventsIEventListener
Takes an interface implemented by the user which contains the methods to be called when the event occurs. - useCapture
- Type: SystemBoolean
If true, useCapture indicates that the user wishes to initiate capture.
After initiating capture, all events of the specified type will be dispatched to the registered
IEventListener
before being dispatched to any Event Targets beneath them in the tree.
Events which are bubbling upward through the tree will not trigger an IEventListener designated to use capture.
Remarks
If an IEventListener is added to an EventTarget while it is processing an event, it will not be triggered
by the current actions but may be triggered during a later stage of event flow, such as the bubbling phase.
If multiple identical Event Listeners are registered on the same EventTarget with the same parameters the duplicate instances are discarded.
They do not cause the IEventListener to be called twice and since they are discarded they do not need to be removed with the
RemoveEventListener(String, IEventListener)
method.
See Also